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The picture quality of today's HDTVs is fantastic. But frankly, the sound can be about as flat as the panel. LG's NB2420A pumps out dynamic, full-bodied sound that will make your TV's tiny speakers seem downright laughable. This sound bar uses virtual surround sound processing to create a wraparound effect that draws you into the action. You'll love the way it brings the soundtracks of DVDs, Blu-ray movies and high-def TV shows to life. You won't even need a receiver or amplifier — this sound bar has built-in amplification powering its six drivers, for clear dialogue and spacious, lifelike effects.

An easy going system

The NB2420A is just about the perfect size for typical 42" TVs. You'll find that it fits perfectly on many tabletops, or you can wall-mount it using the included hardware. And talk about simple — there's even an optical cable included so you can make an easy connection to your TV or disc player to enjoy the cleanest possible sound.

Not just for television

You can also play music through the NB2420A. Built-in Bluetooth® lets you stream your playlist wirelessly from your compatible smartphone, tablet or laptop computer. You can also use the back-panel USB input to enjoy music files from a thumb drive.

Product Highlights:

    Sound bar:
    • 160 watts (80 watts x 2)
    • four 2-1/2" midrange drivers
    • built-in Bluetooth® for wireless audio streaming from compatible smartphones, tablets and laptops
    • two 1" silk dome tweeters
    • wall mounting bracket included
    • requires AC power
    • weight: 5.1 lbs.
    • 39-3/8"W x 3-1/4"H x 2-5/8"D
    • 1 analog stereo mini-jack input
    • 2 optical digital audio inputs
    • USB input for playing music files from a thumb drive

    Sound bar speakers: room-filling sound with less clutter

    Add big sound to your TV without a roomful of speakers. Sound bars require minimal space and wiring, and their sleek designs complement today's flat-panel TVs. Most sound bars have their own built-in amplification, so you won't need to use a home theater receiver. Some models use advanced surround processing and carefully aimed speaker drivers to simulate the effects of a full home theater audio system.

    LG NB2420A Reviews

    Average Customer Review:

    3 Reviews

    LG Sound Bar

    Written by: EthelG from Del Rio,TX on January 7, 2013

    Bought this sound bar for my husband as his birthday present to compliment the 43" flat screen TV he has in his man-cave. To my surprise, it didn't really compliment the TV from a sound point of view. Yes, it looks sleek and nice, mounted underneath the TV, but the sound quality is below-average. I didn't expect this sound quality from the LG brand. This model promotes mediocre highs and mids and is missing the bass that would make it a great surround sound system. Sadly, I had to reconnect the old-school surround sound, minus the center and back speakers to make this home-theatre quality. I should have invested another 100 bucks to buy a sound bar that integrates a bass/subwoofer. Guess I'm not getting rid of the old-school speakers after all.

    Pros: Sleek & Stylish

    Cons: Mediocre/below-average sound

    Sound as uninspiring as stale bread.

    Written by: Anonymous from NEW YORK, NY on November 14, 2012

    Crutchfield Customer Review (What's this?)

    I bought this sound bar for my LG47 7600 tv. To my surprise, the sound produced was lifeless, bland, with no structure whatsoever. Yes, it costs a measly price, but it is an LG after all. I am currently using my tv's speakers --set up chiefly for bass- to complement the flat and cheap sound coming out of that LG sound bar. I wish I had spent an extra $100+ to purchase a unit with a subwoofer (from Yamaha or Polk). I love my LG television but this product ought to be phased out at once because it does nothing but besmirch this great brand.

    Pros: Compact, elegant, Bluetooth capability.

    Cons: Poor sound quality. No bass at all.

    LG Sound Bar

    Written by: Dave from Amarillo,TX on October 17, 2012

    The LG Bar has all sound needed to get the job done .

    Pros: Nice highs and mid rang and bluetooth for you phones ,laptops .

    Cons: only one con would be that you need a sub to go with it .

    Hands-on research

    What's in the box?

    Download owner's manual

    • Sound bar speaker
    • Remote control (AKB73575402)
    • 2 "AAA" batteries
    • 59" Optical (toslink) digital audio cable
    • Wall-mount bracket
    • Cleaning cloth
    • Owner's Manual
    • Wall Bracket Install Guide (Template)
    • Warranty sheet

    Features and Specs

    Enclosure Sealed
    Design ---
    Pieces in System 1
    Color Gloss Black
    Tweeter 1" Dome (2)
    Midrange None
    Woofer 2.5" Cone (4)
    Separate Subwoofer 0
    Subwoofer Driver None
    Surround Sound Decoding No
    Dialogue Enhancement ---
    Auto Volume ---
    4K Video Compatible No
    Audio Return Channel ---
    Remote IR Passthrough No
    Works with TV Remote (IR) ---
    Control by App ---
    Bluetooth Connectivity ---
    Wi-Fi No
    Wall-mountable Yes
    Mounting Bracket Included Yes
    Surface Mount Stand Included Integrated
    Speaker Parts Warranty 1 Year
    Speaker Labor Warranty 90 Days
    Amplifier Parts Warranty 1 Year
    Amplifier Labor Warranty 90 Days
    System Frequency Response Not Given
    Powered System ---
    Sound Bar RMS Power 80 x 2
    Subwoofer RMS Power N/A
    Inputs and Outputs
    Mini Stereo Audio Inputs 1
    RCA Stereo Audio Inputs None
    Optical Digital Audio Inputs 2
    Coaxial Digital Audio Inputs None
    HDMI Inputs None
    HDMI Outputs None
    USB Port No
    Subwoofer Output 0
    Sound Bar (inches) 3-1/4H x 39-3/8W x 2-5/8D
    Sound Bar Weight 5.1 lbs
    Subwoofer (inches) No Subwoofer
    Subwoofer Weight N/A

    Product Research



    Overview: The LG NB2420A Sound Bar Audio System provides virtual 3D surround sound from a single speaker. It make a great addition to your table-top or wall-mounted flat-panel television. The LG NB2420A provides both analog and digital audio connections, along with a USB port and Bluetooth wireless connectivity. The system includes an IR remote for wireless control.

    3D Sound Optimizer: The LG NB2420A Sound Bar Audio System creates a virtual 3D surround sound experience from a single speaker with a wider soundstage and more immersive cinematic sound that will completely envelop you and bring your audio/video content to life.

    160-Watts Amplifier: The LG NB2420A employs an integrated 160-watt amplifier for dynamic sound performance. The amplifier is rated at 80-watts x 2-channel (at 1kHz, into 4-ohms, with 10% THD).

    Two-Way Speaker System: The LG NB2420A Sound Bar features a two-way speaker system with two silk dome tweeters and two pair of parabolar woofers.

    • Silk Dome Tweeter: The NB2420A Sound Bar Audio System utilizes LG's silk dome speaker technology for clearer sound with less distortion, and an overall better sound experience. The sound bar houses a 1" silk dome tweeter.
    • Dual Woofers: The Sound Bar is fitted with four 2.5" parabolar cone woofers for excellent midrange performance.

    Note: The sound bar does not feature a grille. All drivers are exposed.

    Mounting Options: The LG Sound Bar can be either be table-top or wall mounted. The LG Sound Bar can simply be placed on a table, shelf, or stand thanks to its integrated rubber feet. The supplied wall-mount bracket gives you the option of mounting the sound bar on your wall.

    Magnetic Shielding: The LG Sound Bar is magnetically shielded for safe placement next to older CRT television.


    Touch-Sensitive Controls: The LG Sound Bar features touch-sensitive buttons on the front-panel. Functions include; Power On/Off, Volume Up/Down, Play/Pause, Stop, Function (source).

    Remote Control: The LG NB2420A includes an IR remote control for wireless operation of the Sound Bar System. The remote is pre-programmed to control basic functions (Power On/Off, Volume Up/Down, AV Input, Channel Up/Down, & Mute) of select LG flat-panel TVS, and can be programmed to control other manufacture televisions ( Zenith, GoldStar, Samsung, Sony, Hitachi).

    Surround Modes: The LG Sound Bar System has a number of preset surround modes to choose from, based on your listening preference and the source content.

    • Natural: Enjoy comfortable and natural sound.
    • Bypass: Enjoy the sound without equalizer effect.
    • Bass: Reinforces the bass, treble, and surround sound effect.
    • Clear Voice: Makes voices and dialog sound clearer; recommended for Dolby Digital/DTS sources.
    • Game: Enjoy more virtual sound while playing video games.
    • Upscaler: Enhances the sound of compressed MP3/WMA music files; this mode is only available for 2ch sources.
    • Night: Useful when watching movies at low volume lat at night.
    • Loudness: Improves the bass and treble sound.

    A/V Sync (Audio Delay): When receiving audio signal from your TV, sound and images may not be matched. In this case, the AV Sync function lets you adjust the audio delay time between 0 and 300m/sec.

    Dolby DRC (Dynamic Range Control): The Sound Bar provides dynamic range compression for Dolby Digital content to make the sound clearer when the volume is at a low level.

    Mute: The Sound Bar offers a mute function on the remote control to lower the volume to zero immediately.

    Sleep Timer: The LG NB2420A Sound Bar provides a sleep timer function that will automatically turn-off the unit after 10 to 180 minutes.

    Automatic Power On/Off (TV Link): This function automatically turns on/off the Sound Bar when you turn on/off your external device (TV, Sat/cable box, Blu-ray/DVD player, etc.) connected via an optical digital cable.


    Digital Audio Inputs: The LG NB2420A Sound Bar Audio System is fitted with two optical (toslink) digital audio inputs in order to connect multiple digital audio devices; such as your TV and Blu-ray player. The two optical digital inputs support LPCM, Dolby Digital, DTS audio formats.

    Analog Audio Input: The LG NB2420A is equipped with an analog minijack (3.5mm) audio input for connecting your flat-panel TV (that lacks a digital output), or other analog only audio device.

    Bluetooth Connectivity: Built-in Bluetooth technology lets you wirelessly stream audio from your Bluetooth enabled smartphone, tablet, digital audio player, or other BT device to the LG NB2420A. The LG Sound Bar is Bluetooth A2DP (advanced Audio Distribution Profile) compliant; meaning it allows you to stream music from your Bluetooth enabled device, but not control it. You will still control playback of your music from your Bluetooth audio device. Your Bluetooth enabled device must be paired with the NB2420A before operation. Only one device can be paired with this system (it does not support multi-pairing).

    Note: Due to the differences in Bluetooth technology, some Bluetooth enabled devices may be incompatible, function improperly, or may not support all features when used with LG NB2420A.

    USB Port: The LG Sound Bar features a side-panel USB (type-A) port for connecting a USB mass storage class device; such as a USB thumbdrive, digital audio player, or smartphone. The Sound Bar supports playback of MP3/WMA files stored on a compatible USB memory device. The unit provides basic playback functions (Play/Pause, Stop, Fast Forward/Rewind, Skip Track/Folder, & Repeat/Random) over your MP3/WMA music files. The USB port (5V/500mA) will also charge the battery of your USB device.

    • File Extension: .mp3/.wma
    • Sampling Frequency: 32-48kHz (MP3/WMA)
    • Bit Rate: 32-320 kbps (MP3), 40-192 kbps (WMA)
    • Maximum Files: 999

    Note: The unit's USB port cannot recognize external HDDs, Card readers, USB hubs, or computers.

    Our Product Research Team

    At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.